Temp sensor that's too cool not to share

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auraslip   1.21 GW

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Temp sensor that's too cool not to share

Post by auraslip » Feb 24 2011 11:30pm

it also offers a powerful solution called linear rescalability that allows engineers to repurpose the signal output ranges (tailored software offered) so that rescaled output can be displayed rather than direct voltage readings ranging from 0-2V. It is especially suitable for linear output applications in which sensors or other measuring equipments are used to measure pressure, weight, temperature, humidity, voltage and current.
It's not actually a thermometer. I know we ebikers have trouble trying to monitor the temp of our hubs because most thermometers don't go up high enough. With this you could literally monitor anything! And it's only $12! Sure electronics is pretty cool. I've got one of their temp sensors on the way. I'll have to take it apart and see if it's actually just this unit programed to do temp only.
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auraslip   1.21 GW

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Re: Temp sensor that's too cool not to share

Post by auraslip » Feb 24 2011 11:35pm

Earlier I might of said we needed a thermistor, but really a thermocouple is what would work.
Last edited by auraslip on Feb 25 2011 12:07am, edited 1 time in total.
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auraslip   1.21 GW

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Re: Temp sensor that's too cool not to share

Post by auraslip » Feb 24 2011 11:42pm

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Re: Temp sensor that's too cool not to share

Post by John in CR » Feb 25 2011 1:58am

Auraslip,

Isn't the first one just the display? I like the second one though for measuring motor temp, and batt pack or controller temp. $40 seems a bit high though.

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Re: Temp sensor that's too cool not to share

Post by Doctorbass » Feb 25 2011 2:36am

The solution:

BBQ digital temp monitor.. around 10$ good up to 350 celsius



I bought mine at Canadian tire store. What make it great is that it have an alarm setpoint!

All my ebikes have one and i never burned any hub with my 10-20kW..

I leave the winding going up to 140 celsius .. than i decrease throttle.

I shared this idea alot of time over the 3 past years on the E-S

http://www.canadiantire.ca/AST/browse/2 ... ?locale=en


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auraslip   1.21 GW

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Re: Temp sensor that's too cool not to share

Post by auraslip » Feb 25 2011 3:24am

Yeah john it's just the display, but all you need is a thermocouple, a computer, and the simple math to use it it to monitor any temperature.
The solution:

BBQ digital temp monitor.. around 10$ good up to 350 celsius
The easy solution :D
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Re: Temp sensor that's too cool not to share

Post by Metallover » Feb 26 2011 3:08pm

My favorite is the hobbyking vt monitor. It needs a 4-25V source and it goes up to 150C. It has a programmable temperature alarm as well as a low voltage alarm if you desire.

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http://www.hobbyking.com/hobbyking/stor ... oduct=9744
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Re: Temp sensor that's too cool not to share

Post by dangerzone » Mar 15 2011 10:38am

Doctorbass wrote:The solution:

BBQ digital temp monitor.. around 10$ good up to 350 celsius



I bought mine at Canadian tire store. What make it great is that it have an alarm setpoint!

All my ebikes have one and i never burned any hub with my 10-20kW..

I leave the winding going up to 140 celsius .. than i decrease throttle.

I shared this idea alot of time over the 3 past years on the E-S

http://www.canadiantire.ca/AST/browse/2 ... ?locale=en


Doc
Great idea Doc, is there a link about how you installed the probes inside..? I was thinking about getting a dual probe BBQ thermometer, one for the controller and the other one for the coils of the X5, do you have some tips for installation..? Does the induction of the windings have an affect on the probe inside the hub..? Please be so kind to point me to some link where you or anyone has already done that, I would appreciate that very much. ;)

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Re: Temp sensor that's too cool not to share

Post by El_Steak » Mar 15 2011 12:17pm

I use the same BBQ probe as doc (got the idea from him).

My thermistor is installed right under the windings, probably the hottest spot in the motor:

Image
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Re: Temp sensor that's too cool not to share

Post by spinningmagnets » Mar 15 2011 4:47pm

I nominate this thread to be "stickied". El Steak, your temp-probe pic is golden, perfect for the files...

Here's the other temp/probe links that I've saved to my files:

One link of many for ordering the $15 Traxxas temp probe and readout:
http://www.rcsuperstore.com/ProductDeta ... 91&click=2
Here the same type, but from Venom-RC:
http://www.amazon.com/Venom-Temperature ... B003UPTW74
$14 with two probes (controller and motor both!):
http://www.sureelectronics.net/goods.php?id=951
Image

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auraslip   1.21 GW

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Re: Temp sensor that's too cool not to share

Post by auraslip » Mar 15 2011 6:19pm

The problem I have with the traxxis is that it doesn't run on 12v so you have to manually power it on and maybe change the batteries once every 5 years (kidding really)

The same is true for the BBQ sensor and IRRC neither are back lit.

The original one is made by SURE. They also make plug and play thermometers that are 12v and back lit. Also they're $12 shipped.
http://www.sureelectronics.net/goods.php?id=1081
http://www.sure-electronics.net/downloa ... 1.0_EN.pdf
Image

They also have a lot of fun features, but most importantly LOOK GOOD (I'm vain - shoot me) and power up when you turn on your 12v system. Unfortunately, they only go up to 120c. That's way below the currie temperature of magnets, but what is the real max temp we should be setting for our motors?

OTOH, the original temp sensor I posted is scalable.... so you could literally monitor any temp you want by using the appropriate thermocouple and programing via usb the display to what ever you want.

My sure thermometer should be here tomorrow(after almost a month :? ), so I'll posts some pics once it's all setup to monitor my ping pack this summer.
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Re: Temp sensor that's too cool not to share

Post by dangerzone » Mar 16 2011 5:38am

auraslip wrote:The problem I have with the traxxis is that it doesn't run on 12v so you have to manually power it on and maybe change the batteries once every 5 years (kidding really)

The same is true for the BBQ sensor and IRRC neither are back lit.

The original one is made by SURE. They also make plug and play thermometers that are 12v and back lit. Also they're $12 shipped.
http://www.sureelectronics.net/goods.php?id=1081
http://www.sure-electronics.net/downloa ... 1.0_EN.pdf
Image

They also have a lot of fun features, but most importantly LOOK GOOD (I'm vain - shoot me) and power up when you turn on your 12v system. Unfortunately, they only go up to 120c. That's way below the currie temperature of magnets, but what is the real max temp we should be setting for our motors?

OTOH, the original temp sensor I posted is scalable.... so you could literally monitor any temp you want by using the appropriate thermocouple and programing via usb the display to what ever you want.

My sure thermometer should be here tomorrow(after almost a month :? ), so I'll posts some pics once it's all setup to monitor my ping pack this summer.
Auraslip, the display is beautiful. The possibility for dual probes monitoring both the motor temperature and controller temeprature is what I (and I guess the majoritiy of e-bikers here) really need. Yet, the temperature range is not sufficient, it goes from -10 to 60 Centigrade (I dunno how much that is in Farenheit) for one model and from -20 to 120 Centigrade ont he other. And, the X5 motor (5305) can sustain 140 degrees Centigrade with no problem if proper venting and cooling is arranged. If you could find a similar model but with a temperature range of -60 to at least +200 that would be more convenient for X5 use. ;)

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Re: Temp sensor that's too cool not to share

Post by dangerzone » Mar 16 2011 5:41am

spinningmagnets wrote:I nominate this thread to be "stickied". El Steak, your temp-probe pic is golden, perfect for the files...

Here's the other temp/probe links that I've saved to my files:

One link of many for ordering the $15 Traxxas temp probe and readout:
http://www.rcsuperstore.com/ProductDeta ... 91&click=2
Here the same type, but from Venom-RC:
http://www.amazon.com/Venom-Temperature ... B003UPTW74
$14 with two probes (controller and motor both!):
http://www.sureelectronics.net/goods.php?id=951
Image
Those are quite cheap, yet it could be useful to have dual probes and dual display, that way we could monitor both the controller temperature and the motor, do you know of any good yet cheap dual probe thermometers that measure up to +200 degrees Centigrade..?

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Re: Temp sensor that's too cool not to share

Post by dangerzone » Mar 16 2011 5:46am

El_Steak wrote:I use the same BBQ probe as doc (got the idea from him).

My thermistor is installed right under the windings, probably the hottest spot in the motor:

Image
Wow! Nice pic. :)

And the induction of the motor windings does not influence the probe, that is awesome info..! Did you have to bend the probe or was it a smaller one with plastic insulation wires? Does the heat melt the wire insulation..? ;)

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Re: Temp sensor that's too cool not to share

Post by El_Steak » Mar 16 2011 7:36am

The thermistor is tiny, no bending required. You just need to remove it from its protective metal casing and feed the wires through the axle

Obviously, you should do this at the same time as you are replacing the stock phase wires with something beefier (12-10AWG).
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auraslip   1.21 GW

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Re: Temp sensor that's too cool not to share

Post by auraslip » Mar 16 2011 3:38pm

Auraslip, the display is beautiful. The possibility for dual probes monitoring both the motor temperature and controller temeprature is what I (and I guess the majoritiy of e-bikers here) really need. Yet, the temperature range is not sufficient, it goes from -10 to 60 Centigrade (I dunno how much that is in Farenheit) for one model and from -20 to 120 Centigrade ont he other. And, the X5 motor (5305) can sustain 140 degrees Centigrade with no problem if proper venting and cooling is arranged. If you could find a similar model but with a temperature range of -60 to at least +200 that would be more convenient for X5 use. ;)
Ok guys....some one really needs to get the scalable meter I posted at the top of the thread.

It should be very simple to set it up with the proper thermocouple and scale it to the proper temp range. A whole lot simpler and easier than taking apart a motor to install a temp plug!
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auraslip   1.21 GW

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Re: Temp sensor that's too cool not to share

Post by auraslip » Mar 16 2011 4:08pm

Came today - got it installed in my latest project - the cooled battery box for the lawn care bike - I got fans in the box as well as the thermo and I'm gonna monitor the internal temp of the PING as well as the battery box. Liveforphysics strongly disagrees with this being necessary, but cycle fade does happen at higher temps and I'm curious just hot hot a battery gets on the inside. Hopefully I won't need this, but I'll be using this bike in the 100 and 10 million degrees of a texas summer!
Image
AN IPOD??? no. a $15 thermometer
Image
dip switches
Image
I got a bit quick making the box because I'm in a rush to get on the road! Yes that is a 5v usb plug for charging my phone/e cigarettes.
Image
It flashes the channel number as it switches between them.

Also it has a cool feature to switch between C and F
Image
Hit it with a light above 60 lumens (or the sun?)

Image
Cover it

Image
Volia - should be interesting to see how it works in broad daylight when you move in and out of the shade
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Re: Temp sensor that's too cool not to share

Post by Doctorbass » Mar 17 2011 9:21am

There is some REALLY CHEAP thermometer display ( with external sensor included) on Dealextreme.com

I got them for 3$ each.. I bought 5 of them.

They can display up to 110 celsius( tested) and are really small

http://www.dealextreme.com/p/digital-co ... nsor-15553

Image




Also i found this one with smaller display and temp up to 300 celsius for 6$ shipped

http://www.dealextreme.com/p/grill-and- ... 300c-11694


Image


The one I use is this one:
( that include presetable alarm... REALLY USEFULL !!!)

http://www.canadiantire.ca/AST/browse/2 ... ?locale=en
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Re: Temp sensor that's too cool not to share

Post by El_Steak » Mar 17 2011 9:34am

Doc, ifI think that the white one has an auto shut-off feature. It turns the display off after 10-15 minutes which is really annoying. I much prefer the Canadian Tire one that is always on and has a built-in alarm. Great find.
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Re: Temp sensor that's too cool not to share

Post by Green Machine » Apr 06 2011 1:53pm

This is a really a valuable thread..thanks guys for sharing. I really hope cycle analyst adds a temperature sensor to there offerings soon.

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Re: Temp sensor that's too cool not to share

Post by spinningmagnets » Apr 22 2011 10:32pm

This has turned into another thread that should be stickied!...

Heres another find from Beavinator costing $20, wireless with remote alarm when the set temperature is reached.

http://www.amazon.com/gp/product/B004EH ... e=&seller=
Image

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Re: Temp sensor that's too cool not to share

Post by auraslip » Apr 22 2011 11:16pm

I just wrote sure electronics asking them if they can provide a dual thermometer that goes up to 200c, or if they could provide instructions on using the resalable digital display too monitor temperature.

The dual temp sensor would be great, but it might be just as easy to use 2 or more sensors with the rescalable digital display. A switch would be easiest, but some sort of system that switches automatically every 5 seconds would be great too. Imagine monitoring a motor, controller, battery, and ambient! Any thoughts on how to do this?
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auraslip   1.21 GW

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Re: Temp sensor that's too cool not to share

Post by auraslip » May 29 2011 9:09pm

What do you guys recommend for temp sensor wiring when the size of the axle is constrictive like in 9c hubs?

Would this work for temp sensor and hall sensors? http://hobbyking.com/hobbyking/store/uh ... duct=11850
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Re: Temp sensor that's too cool not to share

Post by Arlo1 » May 29 2011 9:33pm

:mrgreen: Now we need wireless!!!
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Re: Temp sensor that's too cool not to share

Post by Metallover » May 30 2011 12:36am

With my 9c I used cat5 wires.. The thin teflon wire that connects the halls might be better tho... 36ga is pretty light so I don't know about that it almost looks like magnet wire
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